Autumn is here with full force. Promote the flannels with flannel shirts, tweed, heavy shoes or boots, colorful leaves on the ground and so on?
When I saw them during the summer months I thought *Ugh WARM!* But now they are perfect. A small boost can't hurt.

(10-08-2017, 02:08 PM)TheContinentalOp Wrote: Ugh. I’m between sizes, you guys who own a pair, should I go low (36) or high (38)?

Size 36 has as actual 37" waist, size 38 is 39" actual. The 1" allowance is standard. If you're 37" the size 36 will fit with no excess to cinch. Some prefer it that way, some prefer more allowance. I'm 29" waist myself and I wear the size 30 flannels (31" actual waist). I did try on size 28 and obviously the fit was more early/mid 30s (less roomy in the seat and crotch) than the late 30s, more loose fit that I prefer.
Be sure you know your actual waist measurement and what your preferences are. Compare to vintage trousers you own, measure them with the waistband fully extended but not stretched. Don't rely on measurements that any seller may have given for the vintage pieces you bought.